/Engine/Plugins/Developer/Concert/ConcertMain/Source/Concert/Public/ConcertMessages.h
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FConcertAdmin_DropSessionRepositoriesResponse : public [FConcertResponseData](API\Plugins\ConcertTransport\FConcertResponseData)
TArray<FGuid>
DroppedRepositoryIds
The list of repository IDs successfully dropped (not found == dropped).